数字转化成 比例图片 适合 投票，百分率显示

/// 显示图象
 /// </summary>
 /// <param name="strContent">相关主题下的内容</param>
 /// <param name="decNumAll">所有的票数</param>
 /// <returns></returns>
    public string GetResult(string strContent, decimal decNumAll)
    {
        string[] arrContent = strContent.Split('|');
        string strBody = "<table width=100% border=1>\n";
        foreach (string strContentIN in arrContent)
        {
            string strItemName = strContentIN.Split(',')[1].ToString();//得到选项名称
            decimal decItemNum = Convert.ToDecimal(strContentIN.Split(',')[0]);//得到选项的投票数
            decimal decPercent = GetPercent(decItemNum, decNumAll) * 100;//得到百分比    
            string strPercent = decPercent.ToString();//将百分比转为字符型
            if (strPercent.Length > 5)//如果百分比结果长度超过5位
            {
                strPercent = strPercent.Substring(0, 5);//将百分比的余数截短为“00.00”
            }
            strBody += "<tr><td width=100>" + strItemName + "</td><td width=50>" + decItemNum.ToString() + "票</td><td><img src=Images/bar1.gif height=10 width=" + strPercent + "%>" + strPercent + "%</td></tr>\n";
        }
        strBody += "</table>";
        return strBody;
    }
 

 /// <summary>
 /// 票数求和
 /// </summary>
 /// <param name="strNum">当前所要操作的字串</param>
 /// <returns></returns>
    public decimal GetNumAll(string strNum)
    {
        decimal decNumAll = 0;
        string[] arrNum = strNum.Split('|');
        foreach (string strNumIN in arrNum)
        {
            decNumAll += Convert.ToInt32(strNumIN.Split(',')[0].ToString());//截取第零位
        }
        return decNumAll;
    }
 
 /// <summary>
 /// 百分比
 /// </summary>
 /// <param name="decItem">当前选项本身的票数</param>
 /// <param name="decNumAll">所有的票数</param>
 /// <returns></returns>
    public decimal GetPercent(decimal decItem, decimal decNumAll)
    {
        if (decNumAll == 0)//如果总票数是零
        {
            decNumAll++;//加一，避免除0出错
        }
        decimal decPercent = decItem / decNumAll;
        return decPercent;
    }